Improvement in ventilating cars



UNITED STATES PATENT EEICE.

EDWARD E. HAEGEEAvEs, lor sAENIA, CANADA.

IMPROVEMENT IN VENTILATING CARS.

Specification forming part of Letters Patent No. 170,364, dated November 23, 1875 application led October 5, 1875.

To all whom it may concern:

Be it known that` I, EDWARD E. HAE- GREAvEs, of Sarnia, in the county of Lambton and Dominion of Canada, have invented an Improvement in Ventilating Railroad-Cars, of which the following is a specification:

rIhe nature of my invention relates'to an improvement in Ventilating railway-cars; and has for its object withdrawing the air from the interior of the car at as many points as may be desired, thereby creating, to a certain extent, a vacuum, which is filled with fresh, uncontaminated air from the outside, effecting, as often as is necessary lor desirable, a

complete change in the atmosphere of the car, while at the same time the interior of the car is kept free from dust.

The invention consists in two clutch-pulleys on the car-axle, in combination with the exhaust-fan and connecting-belts, whereby the exhaust-fan may always be revolved in the same direction, whether the car is moving either way. V

Figure 1 is a view of the under side of the floor or platform of the car, showing the exhaust-fan and its connection with the axle, by the rotation of which the fan is operated. Fig. 2 is a vertical cross-section of the car on the line of the fan in Fig. l.

Like letters indicate like vparts in each figure.

In the drawings, A represents the platform or iioor of a railway-coach, to the under side of which is firmly secured a rotary exhaust-fan, B, which communicates with the pipe C in the interior of the car, and which terminates in a partially bell-shaped mouth near the ceiling or under side of the root' D of the coach. E E are two clutch-pulleys, sleeved on the axle F, and so arranged that one or the other of said clutch-pulleys may be engaged, at will, with the pulley G, which is rigidly secured to said axle between the clutch'- pulleys by means of suitable levers, (Ilot shown,) and placed within reach ofthe brake man on the platform. From and around each of these clutch-pulleys to and around the shaft H of the exhaust-fan lead the belts I I', the former being a straight belt, and the lat tera crossed belt.

When the car is running in one direction the clutch and straight belt are employed to run the fan. When the direction of the car is reversed, this clutch, by means of the lever above referred to, should be disengaged, and the operation brings into engagement the other clutch and the crossed belt, and securing the same motion to the fan; otherwise the fan would be reversed with the reversed motion of .the car, and be converted into a blowingfan.

This fan may be connected with a branch' ing series of pipes, so arranged as to withdraw the air from as many points in the car as may be desired; but the free open ends of allthe pipes that may be employed should terminate just below the ceiling, and the mouths may be hidden by a false ceiling, K, extending the whole length ot' the car. When the false ceiling is employed it should be perforated with a series of small openings, to allow the air to pass through them freely to the mouths of the pipes. These openings may be provided with connected slides or valves, by means of which the openings may be closed at will.

The windows of a car provided With this apparatus should be fastened, so that passengers could not open them, and in the door or side walls ot' the car there should be open-v ings, suitably protected by screens, to exclude foreign substances, for admission of fresh air fromthe outside as fast as the inside air is exhausted.

What I claim as my invention, and desire to lsecure by Letters Patent, is-

The axle F, clutch-pulleys E E, rigid pulley G, belts I l', and exhaust-fan B, when combined 'with the platform or ioorA of a railway-coach, substantially as set forth.

EDWARD E. HARGREAVES. Witnesses:

.IHos. S. SPRAGUE, S. C. OWEN. 

